Herbert l



(No Model.) v H. L. OURRIER.

STOP MECHANISM FOR STEAM ENGINESI No. 398,314. I I Patented Feb. 19, 1889.

T v ammmam M. r aM/kL z Z255 Nrrnn STATES PATENT trier.

HERBERT Ii. OURRIER, OF LYNN, MASSACHUSETTS.

STOP MECHANISM FOR STEAM-ENGINES.

SPECIFICATION forming part of Letters Patent No. 398,314, dated February 19, 18389. Application filed May 14, 1888. Serial No. 273,763. (No model.)

To aZZ whom, it may concern:

Be it known that I, HERBERT L. CURRlER, of Lynn,in the county of Essex,Sl1ate of Mes sachusetts, have invented a certain new and Steam-Engines, of which the following a description sui'iiciently full, clear, and exact to enable any person skilled in the art or science to which said invention appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a side elevation showing an engine provided with my improvement and in a position for use in a building, a portion of the wall of the building being represented as broken away; Fig. 2, an enlarged front eleva' tion of the steam-eylinder and throttle pr0- vided with my improvement, the body of the engine being .removed and a floor of the building shown in section; Fig. 3, a top plan View of the throttle and magnet, the steam-pipe being represented as broken off; and Fig. Al, an. elevation showing certain details of construction.

Like letters and figures of reference indicate corresponding parts in the different figures of the drawings.

My invention. relates to a stop mechanism for steam-engines which is actuated by electricity; and it consists in certain novel features, as hereinafter fully set forth and claimed, the object being to produce a simple, cheap, and effective device of this character, by means of which the engine may be instantly stopped from any point in the build ing in which it is located.-

The nature and operation of the improvement will be readily understood by all conversant with such matters from the following explanation:

In the drawings, A represents the building, B the engine considered as a whole, C the steam-supply pipe, D the cylinder, and H the steam-chest, these parts being all of theordinary form and construction. An ordinary throttle-valve, (not shown) provided with a stem or shaft, 2, and hand-wheel 0c, is fitted to work in the supply-pipe O in the usual manner. A horizon tally-arranged shelf or bracket, f, is attached to the steam-pipe 0 near the stem .2, and secured to a standard, 61, on said shelf there is a small electro-magnet, m, of the ordinary form and construction. Conducting-wires g it lead from the eleetro-mag- 3 net or through ihe floor K to an ordinary pril useful Improvement 111 Stop Mechanism for mary battery, J, which. may be disposed in any convenient position in the building. An ordinary push-buttoini, is introduced in said wires in the usual manner, said button being located in a room of the building (see Fig. 2) and preferably inclosed in a box, A, provided with a glass front, 17, which may be readily broken when it becomes necessary to use said button for operating the electric device. A vertically-arranged cylinder or tube, 0", is secured to the shelf f, and fitted to slide vertically in said cylinder is a circular bolt or weight, P.

A bell-crank lever, Q, is centrally pivoted in standards 25, secured to the shelff, one arm, 1:, thereof projecting through a "ertical slot, 20, formed in the side of the tube 0', and the opposite arm, y, engaging a notch, b, in the periphery of the hand-wheela: on the throttle stem or shaft A coiled spring, 15, is disposed in the bottom of the cylinder r under the arm '0 of said lever, the purpose of said spring being to hold the arm 7 in engagement with the notch 19 in the throttle wheel 00.

An armature, 16, is secured to the upper end of the long arm 17 of a bell-crank lever, B, which is centrally pivoted in standards 19 on the shelf f, said armature being placed adjacent to the poles of the magnet, or in such position that the magnet will act on it in the usual manner when the circuit is closed by the button The outer face of the armature 16 is pro vided with a horizontally-arranged pin, 21, adapted to enter a hole in the tube or cylinder 0" and project into the path of the Weight P, its purpose being to sustain the weight in an elevated position, as shown in Fig. 2.

A coiled spring, 20, is disposed under the short arm 19 of the armaturedever R, which acts expansively to keep said pin in position in the hole in said tube.

The throttle-stem 2 is provided with a reel, 25, on which is wound a cord, 2 ,said cord passing over a pulley or pulleys, 27, secured to the floor K and being provided on. its outer end with a Weight, 28.

A push-button, 30, is secured to the stean1- pipe 0 or other position convenient for use by the engineer, said button being connected by branch condueting-wires 31 and 32 with the main wires (1 72. I

In opening the throttle to admit steam through the pipe (1 and start the engine, its wheel at is turned from right to left by the engineer in the usual manner, thereby causing the cord 26 to be wound onto the reel 25.

The arm 11 of the lever Q is so situated that when the stem is turned out to its fullest extent and the throttle-valve opened, the end of said arm will enter the notch 19 in the throttie-wheel 00, thereby serving as a pawl to prevent said wheel from being rotated from left to right, and thus closing the valve until said arm is disengaged.

The weight P having been mounted or adjusted on the pin 21, as shown in Fig. 2, it now it becomes desirable in any room of the building to have the engine stopped, the glass 13 in the box 76 is broken and the push-button i operated in the usual manner to complete the circuit, and thereby cause the magnet on to act. As the electric current passes through the wires to the magnet, the magnet instantly attracts the armature 16 and draws the pin 21 out of the hole in the tube 0'', thereby releasing the weight P, which falls downward onto the arm "0 of the bell-crank lever Q and trees the throttle-wheel a; from the arm 1 of said lever. As soon as said arm is disengaged from the wheel m the weight 28 at once drops, causing the rope 26 to unwind from the reel 25 and the throttle-stem to be revolved from left to right, thereby shutting off the steam and stopping the engine in a manner that will be readily understood by all conversant with such matters without a more explicit description. 3y using the push-button 30 the engineer can stop' the engine in a like manner, when desired, without turning the throttlewheel a: by hand.

Instead of providing the t] nettle-stem with a reel, 25, and cord 26, as described, a spring may be secured to the steam-pipe and throttie-wheel 00, said spring acting torsionally to turn said wheel from left to right when released t'rom the pawl, thereby stopping the engine.

It will be understood that each room. in the building is to be provided with a push-button, 7:, connected with the battery and magnet by conductii'ig-wircs in substantially the same manner as described.

Having thus explained m y iuvention,what I claim is 1. The combination of a tube provided with a perforation, a weight withinsaid tube, an electro-magnet in proximity thereto, an electric circuit in connection therewith, an armature provided with a stop-pin normally pro jecting through the perforation in said tube for sustaining said weight in elevated position, an automatic valve-closer, and adjunctive mechanism actuated by said weight for releasing the valve-closer.

2. In a device of the character described, the combination of the engine B, having the steanrpipe C, a throttle-valve for said pipe having the stem ,2, the reel 25, and wheel 00, provided with the notch b, disposed on said stem, the cord 26, wound on said reel and provided with the weight 28, the tube 0", provided with the slot 10, the weight P, disposed in said tube, the pivotal pawl Q, having the arms 11 and r, the arm '1; beinginserted in said slot and the arm 1 adapted to engage the notch in the wheel .r, the spring 15 for the pawl Q, the pivoted lever R, having the arms 1.7 and 1f), the armature 16, and stud 21, mounted on the arm 17, said stud being adapted to pass through a hole in the side of said tube and engage the weight 1', the spring 20 for the lever R, the magnet m, the battery J, the wires 9 7L, and pushbution 1 substantially as specified.

HE RBER'I L. CURRIER.

\Yitnesses:

O; M. SHAW, CHAS. L. HUNT. 

